Playback parameter signalling can be quite complex because
(a) the renderer clock often has a delay before it realizes
that it doesn't support a previously set speed and
(b) the speed set on media clock sometimes intentionally
differs from the one surfaced to the user, e.g. during
live speed adjustment or when overriding ad playback
speed to 1.0f.
This change fixes two problems related to this signalling:
1. When resetting the media clock speed at a period transition,
we don't currently tell the renderers that this happened.
2. When a delayed speed change update from the media clock is
pending and the renderer for this media clock is disabled
before the change can be handled, the pending update becomes
stale but it still applied later and overrides any other valid
speed set in the meantime.
Both edge cases are also covered by extended or new player tests.
Issue: google/ExoPlayer#10882
PiperOrigin-RevId: 512658918
(cherry picked from commit e79b47ccff39363543c514937aef517a855994f0)
f690ebdf46